Check the website:
Thanks everyone for the awesome work here... this was such a great experience. As said before, you are all winners, really. We've just selected one design to use.
Just some observations which may help improve the design...
The logo is too big in relation to the type.
Too much tracking on the type.
The S is weak and the tail of the T is ugly.
The crossbar of the E is relatively too straight and clean.
The canopy of the tree is lost.
The logo is inappropriately symmetrical and could use a lot of refinement.
The underline adds nothing.
Too similar to Avatar.
May I suggest that it would be a good idea to post the Sintel logo and logotype on Typophile's design forum...
It's where a lot of top typographers and design professionals hang out. You can be sure to get expert constructive feedback there, and also increase awareness of Blender at the same time.